Happy New Year everyone,
A friend brought over a SONY DA5000ES surround receiver where the owner had shorted speaker leads and blown a channel. He (my friend, not the owner)had replaced the 4 output devices in the channel (Q1671,1681, and
2 others that I can't see with the unit assembled.) sourcing the output transistors from Sony.The amp now powers up with a displayed message of "Check Code 11" The topology of the receiver is totally unknown to me, and of course he does not have a schematic diagram or service manual.
Any ideas?
Many thanks, Tim Schwartz Bristol Electronics